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Plan Review Notes

Notes

Date	Text
2022-10-27 15:40:57.00000	REFER TO SHEET E-1 FOR THE FOLLOWING COMMENTS:
	1] SHOW TRANSFORMER GROUNDING ELECTRODE CONNECTION TO
	EXISTING (OR REPLACED) BUILDING SERVICE GROUNDING
	ELECTRODE. SHOW GROUNDING ELECTRODE CONDUCTOR SIZE
	BETWEEN TRANSFORMER AND BUILDING ELECTRODE. 250.30
	(A)(4), TABLE 250.66.
	2] TRANSFORMER SECONDARY PROTECTION MUST NOT EXCEED
	250% OF RATED SECONDARY OUTPUT. FOR THIS PURPOSE, THE
	SECONDARY IS IDENTIFIED AS CONNECTING TO THE UTILITY
	WITH 240 VOLTS 3-PHASE. TABLE 450.3 (B).
	3] SHOW PERMANENT LABEL ON TRANSFORMER INDICATING THE
	LOCATION OF THE PRIMARY DISCONNECTING MEANS, OR INSTALL
	UNFUSED PRIMARY DISCONNECT WITHIN SIGHT OF TRANSFORMER.
	FOR THIS PURPOSE, THE PRIMARY IS IDENTIFIED AS
	CONNECTING TO THE INVERTER. 450.14.
	4] IT IS RECOGNIZED FROM PREVIOUS INSPECTIONS THAT
	CONDUCTOR ID #6 IN THE TRENCH DOES NOT INCLUDE AN
	EQUIPMENT GROUNDING CONDUCTOR AS SHOWN ON THE PLANS.
	THIS SET OF CONDUCTORS CONSISTS OF ONLY FOUR INSULATED
	WIRES; AS SUCH, IT IS NOT POSSIBLE TO
	PROVIDE BOTH A NEUTRAL AND AN EQUIPMENT GROUND BETWEEN
	THE INVERTER AND THE TRANSFORMER. AN EQUIPMENT GROUND
	IS MANDATORY; VERIFY MANUFACTURER REQUIREMENT FOR
	INVERTER OPERATION WITHOUT A NEUTRAL CONDUCTOR.